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                                <h1 id="&#x6570;&#x636E;&#x83B7;&#x53D6;">&#x6570;&#x636E;&#x83B7;&#x53D6;</h1>
<p>&#x6709;&#x65F6;&#x5019;&#xFF0C;&#x8FDB;&#x5165;&#x67D0;&#x4E2A;&#x8DEF;&#x7531;&#x540E;&#xFF0C;&#x9700;&#x8981;&#x4ECE;&#x670D;&#x52A1;&#x5668;&#x83B7;&#x53D6;&#x6570;&#x636E;&#x3002;&#x4F8B;&#x5982;&#xFF0C;&#x5728;&#x6E32;&#x67D3;&#x7528;&#x6237;&#x4FE1;&#x606F;&#x65F6;&#xFF0C;&#x4F60;&#x9700;&#x8981;&#x4ECE;&#x670D;&#x52A1;&#x5668;&#x83B7;&#x53D6;&#x7528;&#x6237;&#x7684;&#x6570;&#x636E;&#x3002;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x901A;&#x8FC7;&#x4E24;&#x79CD;&#x65B9;&#x5F0F;&#x6765;&#x5B9E;&#x73B0;&#xFF1A;</p>
<ul>
<li><p><strong>&#x5BFC;&#x822A;&#x5B8C;&#x6210;&#x4E4B;&#x540E;&#x83B7;&#x53D6;</strong>&#xFF1A;&#x5148;&#x5B8C;&#x6210;&#x5BFC;&#x822A;&#xFF0C;&#x7136;&#x540E;&#x5728;&#x63A5;&#x4E0B;&#x6765;&#x7684;&#x7EC4;&#x4EF6;&#x751F;&#x547D;&#x5468;&#x671F;&#x94A9;&#x5B50;&#x4E2D;&#x83B7;&#x53D6;&#x6570;&#x636E;&#x3002;&#x5728;&#x6570;&#x636E;&#x83B7;&#x53D6;&#x671F;&#x95F4;&#x663E;&#x793A;&#x300E;&#x52A0;&#x8F7D;&#x4E2D;&#x300F;&#x4E4B;&#x7C7B;&#x7684;&#x6307;&#x793A;&#x3002;</p>
</li>
<li><p><strong>&#x5BFC;&#x822A;&#x5B8C;&#x6210;&#x4E4B;&#x524D;&#x83B7;&#x53D6;</strong>&#xFF1A;&#x5BFC;&#x822A;&#x5B8C;&#x6210;&#x524D;&#xFF0C;&#x5728;&#x8DEF;&#x7531;&#x7684; <code>enter</code> &#x94A9;&#x5B50;&#x4E2D;&#x83B7;&#x53D6;&#x6570;&#x636E;&#xFF0C;&#x5728;&#x6570;&#x636E;&#x83B7;&#x53D6;&#x6210;&#x529F;&#x540E;&#x6267;&#x884C;&#x5BFC;&#x822A;&#x3002;</p>
</li>
</ul>
<p>&#x4ECE;&#x6280;&#x672F;&#x89D2;&#x5EA6;&#x8BB2;&#xFF0C;&#x4E24;&#x79CD;&#x65B9;&#x5F0F;&#x90FD;&#x4E0D;&#x9519; &#x2014;&#x2014; &#x5C31;&#x770B;&#x4F60;&#x60F3;&#x8981;&#x7684;&#x7528;&#x6237;&#x4F53;&#x9A8C;&#x662F;&#x54EA;&#x79CD;&#x3002;</p>
<h2 id="&#x5BFC;&#x822A;&#x5B8C;&#x6210;&#x540E;&#x83B7;&#x53D6;&#x6570;&#x636E;">&#x5BFC;&#x822A;&#x5B8C;&#x6210;&#x540E;&#x83B7;&#x53D6;&#x6570;&#x636E;</h2>
<p>&#x5F53;&#x4F60;&#x4F7F;&#x7528;&#x8FD9;&#x79CD;&#x65B9;&#x5F0F;&#x65F6;&#xFF0C;&#x6211;&#x4EEC;&#x4F1A;&#x9A6C;&#x4E0A;&#x5BFC;&#x822A;&#x548C;&#x6E32;&#x67D3;&#x7EC4;&#x4EF6;&#xFF0C;&#x7136;&#x540E;&#x5728;&#x7EC4;&#x4EF6;&#x7684; <code>created</code> &#x94A9;&#x5B50;&#x4E2D;&#x83B7;&#x53D6;&#x6570;&#x636E;&#x3002;&#x8FD9;&#x8BA9;&#x6211;&#x4EEC;&#x6709;&#x673A;&#x4F1A;&#x5728;&#x6570;&#x636E;&#x83B7;&#x53D6;&#x671F;&#x95F4;&#x5C55;&#x793A;&#x4E00;&#x4E2A; loading &#x72B6;&#x6001;&#xFF0C;&#x8FD8;&#x53EF;&#x4EE5;&#x5728;&#x4E0D;&#x540C;&#x89C6;&#x56FE;&#x95F4;&#x5C55;&#x793A;&#x4E0D;&#x540C;&#x7684; loading &#x72B6;&#x6001;&#x3002;</p>
<p>&#x5047;&#x8BBE;&#x6211;&#x4EEC;&#x6709;&#x4E00;&#x4E2A; <code>Post</code> &#x7EC4;&#x4EF6;&#xFF0C;&#x9700;&#x8981;&#x57FA;&#x4E8E; <code>$route.params.id</code> &#x83B7;&#x53D6;&#x6587;&#x7AE0;&#x6570;&#x636E;&#xFF1A;</p>
<pre><code class="lang-html"><span class="hljs-tag">&lt;<span class="hljs-name">template</span>&gt;</span>
  <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;post&quot;</span>&gt;</span>
    <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;loading&quot;</span> <span class="hljs-attr">v-if</span>=<span class="hljs-string">&quot;loading&quot;</span>&gt;</span>
      Loading...
    <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span>

    <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">v-if</span>=<span class="hljs-string">&quot;error&quot;</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;error&quot;</span>&gt;</span>

    <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span>

    <span class="hljs-tag">&lt;<span class="hljs-name">div</span> <span class="hljs-attr">v-if</span>=<span class="hljs-string">&quot;post&quot;</span> <span class="hljs-attr">class</span>=<span class="hljs-string">&quot;content&quot;</span>&gt;</span>
      <span class="hljs-tag">&lt;<span class="hljs-name">h2</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">h2</span>&gt;</span>
      <span class="hljs-tag">&lt;<span class="hljs-name">p</span>&gt;</span><span class="hljs-tag">&lt;/<span class="hljs-name">p</span>&gt;</span>
    <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span>
  <span class="hljs-tag">&lt;/<span class="hljs-name">div</span>&gt;</span>
<span class="hljs-tag">&lt;/<span class="hljs-name">template</span>&gt;</span>
</code></pre>
<pre><code class="lang-js"><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> {
  data () {
    <span class="hljs-keyword">return</span> {
      loading: <span class="hljs-literal">false</span>,
      post: <span class="hljs-literal">null</span>,
      error: <span class="hljs-literal">null</span>
    }
  },
  created () {
    <span class="hljs-comment">// &#x7EC4;&#x4EF6;&#x521B;&#x5EFA;&#x5B8C;&#x540E;&#x83B7;&#x53D6;&#x6570;&#x636E;&#xFF0C;</span>
    <span class="hljs-comment">// &#x6B64;&#x65F6; data &#x5DF2;&#x7ECF;&#x88AB; observed &#x4E86;</span>
    <span class="hljs-keyword">this</span>.fetchData()
  },
  watch: {
    <span class="hljs-comment">// &#x5982;&#x679C;&#x8DEF;&#x7531;&#x6709;&#x53D8;&#x5316;&#xFF0C;&#x4F1A;&#x518D;&#x6B21;&#x6267;&#x884C;&#x8BE5;&#x65B9;&#x6CD5;</span>
    <span class="hljs-string">&apos;$route&apos;</span>: <span class="hljs-string">&apos;fetchData&apos;</span>
  },
  methods: {
    fetchData () {
      <span class="hljs-keyword">this</span>.error = <span class="hljs-keyword">this</span>.post = <span class="hljs-literal">null</span>
      <span class="hljs-keyword">this</span>.loading = <span class="hljs-literal">true</span>
      <span class="hljs-comment">// replace getPost with your data fetching util / API wrapper</span>
      getPost(<span class="hljs-keyword">this</span>.$route.params.id, (err, post) =&gt; {
        <span class="hljs-keyword">this</span>.loading = <span class="hljs-literal">false</span>
        <span class="hljs-keyword">if</span> (err) {
          <span class="hljs-keyword">this</span>.error = err.toString()
        } <span class="hljs-keyword">else</span> {
          <span class="hljs-keyword">this</span>.post = post
        }
      })
    }
  }
}
</code></pre>
<h2 id="&#x5728;&#x5BFC;&#x822A;&#x5B8C;&#x6210;&#x524D;&#x83B7;&#x53D6;&#x6570;&#x636E;">&#x5728;&#x5BFC;&#x822A;&#x5B8C;&#x6210;&#x524D;&#x83B7;&#x53D6;&#x6570;&#x636E;</h2>
<p>&#x901A;&#x8FC7;&#x8FD9;&#x79CD;&#x65B9;&#x5F0F;&#xFF0C;&#x6211;&#x4EEC;&#x5728;&#x5BFC;&#x822A;&#x8F6C;&#x5165;&#x65B0;&#x7684;&#x8DEF;&#x7531;&#x524D;&#x83B7;&#x53D6;&#x6570;&#x636E;&#x3002;&#x6211;&#x4EEC;&#x53EF;&#x4EE5;&#x5728;&#x63A5;&#x4E0B;&#x6765;&#x7684;&#x7EC4;&#x4EF6;&#x7684;  <code>beforeRouteEnter</code> &#x94A9;&#x5B50;&#x4E2D;&#x83B7;&#x53D6;&#x6570;&#x636E;&#xFF0C;&#x5F53;&#x6570;&#x636E;&#x83B7;&#x53D6;&#x6210;&#x529F;&#x540E;&#x53EA;&#x8C03;&#x7528; <code>next</code> &#x65B9;&#x6CD5;&#x3002;</p>
<pre><code class="lang-js"><span class="hljs-keyword">export</span> <span class="hljs-keyword">default</span> {
  data () {
    <span class="hljs-keyword">return</span> {
      post: <span class="hljs-literal">null</span>,
      error: <span class="hljs-literal">null</span>
    }
  },
  beforeRouteEnter (to, <span class="hljs-keyword">from</span>, next) {
    getPost(to.params.id, (err, post) =&gt; 
      <span class="hljs-keyword">if</span> (err) {
        <span class="hljs-comment">// display some global error message</span>
        next(<span class="hljs-literal">false</span>)
      } <span class="hljs-keyword">else</span> {
        next(vm =&gt; {
          vm.post = post
        })
      }
    })
  },
  <span class="hljs-comment">// &#x8DEF;&#x7531;&#x6539;&#x53D8;&#x524D;&#xFF0C;&#x7EC4;&#x4EF6;&#x5C31;&#x5DF2;&#x7ECF;&#x6E32;&#x67D3;&#x5B8C;&#x4E86;</span>
  <span class="hljs-comment">// &#x903B;&#x8F91;&#x7A0D;&#x7A0D;&#x4E0D;&#x540C;</span>
  watch: {
    $route () {
      <span class="hljs-keyword">this</span>.post = <span class="hljs-literal">null</span>
      getPost(<span class="hljs-keyword">this</span>.$route.params.id, (err, post) =&gt; {
        <span class="hljs-keyword">if</span> (err) {
          <span class="hljs-keyword">this</span>.error = err.toString()
        } <span class="hljs-keyword">else</span> {
          <span class="hljs-keyword">this</span>.post = post
        }
      })
    }
  }
}
</code></pre>
<p>&#x5728;&#x4E3A;&#x540E;&#x9762;&#x7684;&#x89C6;&#x56FE;&#x83B7;&#x53D6;&#x6570;&#x636E;&#x65F6;&#xFF0C;&#x7528;&#x6237;&#x4F1A;&#x505C;&#x7559;&#x5728;&#x5F53;&#x524D;&#x7684;&#x754C;&#x9762;&#xFF0C;&#x56E0;&#x6B64;&#x5EFA;&#x8BAE;&#x5728;&#x6570;&#x636E;&#x83B7;&#x53D6;&#x671F;&#x95F4;&#xFF0C;&#x663E;&#x793A;&#x4E00;&#x4E9B;&#x8FDB;&#x5EA6;&#x6761;&#x6216;&#x8005;&#x522B;&#x7684;&#x6307;&#x793A;&#x3002;&#x5982;&#x679C;&#x6570;&#x636E;&#x83B7;&#x53D6;&#x5931;&#x8D25;&#xFF0C;&#x540C;&#x6837;&#x6709;&#x5FC5;&#x8981;&#x5C55;&#x793A;&#x4E00;&#x4E9B;&#x5168;&#x5C40;&#x7684;&#x9519;&#x8BEF;&#x63D0;&#x9192;&#x3002;</p>

                                
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